<template>
  <div>
    <div class="search">
      <input type="text" v-model="keyword" class="search-input" placeholder="输入城市名或拼音">
    </div>
    <div class="search-content" ref="search" v-show="keyword">
      <ul>
        <li class="search-item border-bottom" 
            v-for="(item, index) in list" 
            :key="index"
            @click="handleCityClick(item.name)">
            {{item.name}}
        </li>
        <li class="search-item border-bottom" v-show="hasNoData">
          没有找到匹配数据
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
  export default {
    name: 'citySearch',
    props: {
      cities: Object
    },
    data () {
      return {
        keyword: '',
        list: [],
        timer: null
      }
    },
    watch: {
      keyword () {
        if (this.timer) {
          clearTimeout(this.timer)
        }
        if (!this.keyword) {
          this.list = []
          return
        }
        this.timer = setTimeout(() => {
          const result = []
          for (let i in this.cities) {
            this.cities[i].forEach((value) => {
              if (value.spell.indexOf(this.keyword) > -1 || 
                  value.name.indexOf(this.keyword) > -1) {
                  result.push(value)
              }
            })
          }
          this.list = result
        }, 100)
      }
    },
    mounted () {
      this.scroll = new Bscroll(this.$refs.search)
    },
    computed: {
      hasNoData () {
        return !this.list.length
      }
    },
    methods: {
      handleCityClick (city) {
        this.$store.commit('changeCity', city)
        this.$router.push('/')
      }
    }
  }
</script>

<style lang="stylus" scoped>
  .search
    height: .72rem
    padding: 0 .1rem
    background: #00bcd4
    .search-input
      box-sizing: border-box
      width: 100%
      height: .62rem
      padding: 0 .1rem
      line-height: .62rem
      text-align: center
      border-radius: .06rem
      color: #666
  .search-content
    z-index: 1
    overflow: hidden
    position: absolute 
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    background: #eee
    .search-item
      line-height: .62rem
      padding-left: .2rem
      background: #fff
      color: #666
      text-align: center
</style>
